The air defence of Russia is not limited to just aircraft... and neither it should be.
No matter the SAM system whether it is the 400km range S-400 or 600km range S-500 or all the smaller and shorter ranged weapons it is simply not practical to base a nations air defences on SAMs alone.
Britain learned that bitter lesson when it cancelled domestic fighter aircraft development in the 1960s because SAMs were going to protect Britain and her allies.
In fact you could say the US made the same mistake when it decided missiles will do everything so fighter aircraft didn't need guns any more.
If you want a coastal navy then you don't need carriers. Land based air power is enough.
If you want a blue water navy then carriers are essential, because they add range to your sight and your reach and greatly increase your persistence.
An ASW helo from a frigate might do a good job out to about 100km around the ship for maybe 4-6 huors at a time and then have to return a refuel. When it is looking in one direction it wont be able to search in other areas so that 100km is not 100km around the frigate... it is more like 20km around the helo where ever it might be at the time.
A carrier on the other hand can use multiple helos in multiple directions, with the potential for fighters to rapidly deliver sonobouys quickly to where they might be useful much faster than a helo could deliver them...
And lastly in peace time a threat blob on a radar 350km to your west is just a blob till you send aircraft out to see what it actually is... without a carrier you have to wait until it gets to visual range... which might be too late. Do you shoot?
What about in war time?
What if it turns out to be an airliner full of the citizens of an allied country you mistakenly fire a missile at... the missile wont recognise it as a non combatant and stand down...
And not just aircraft, there are enormous numbers of sea traffic around the place, just ships and subs on their own have little option to have a look from very long range...
and Russia doesn't need to DO anything for the global reality to shift more and more in it's favor in that regard,
Lots of assumptions there... carriers give Russia the option of supporting an ally even if they can't get a land air base nearby easily.
[quote]For Russia, an aircraft carrier is just a floating airfield at the sea, to increase the reach of air forces toward the big oceans. Just it.
A sustainable airfield at the middle of the sea can provide quite a number of good things. For example enhance the dominance and control at a certain sea area. Not neccessary a global control in a far far away sea region, Russia can design an use the carriers for adjacent sea areas.
Russian aircraft carriers will provide more places for helicopters like Alligator or Helix, which are suitable for both combat roles and AWACS roles. Of course fixed wingers like Su-27/30/33/34/35 or MiG-29/35 can use these sea airfields without any problems.[/quote
Russian carriers are an outer ring for the air defence of vision and reach with fighter aircraft and anti sub helicopters to add another defense layer for ships to improve their protection from anti ship missiles and aircraft and of course submarines.
They add a layer that can be called back, that can make intelligent decisions and react in real time to the actions of the enemy and allies alike.
they add a flexibility and extra reach and vision that missiles alone cannot.
To defend early warning is critical and being able to act earlier against a mass attack makes survival much more likely.
You don't spend trillions on a new navy, but not bother to put up an electric fence around the border of your property.